ForecastServiceAPI provides an interface to enable mocking the
forecastservice.ForecastService service client's API operation,
paginators, and waiters. This make unit testing your code that calls out
to the SDK's service client's calls easier.

The best way to use this interface is so the SDK's service client's calls
can be stubbed out for unit testing your code with the SDK without needing
to inject custom request handlers into the SDK's request pipeline.

It is important to note that this interface will have breaking changes
when the service model is updated and adds new API operations, paginators,
and waiters. Its suggested to use the pattern above for testing, or using
tooling to generate mocks to satisfy the interfaces.